Morgans L F, Nunneley S A, Stribley R F
Aviat Space Environ Med. 1981 May;52(5):291-3.
Ear canal temperature (Tac) is a useful indicator of human body temperature under some laboratory conditions. Tac has also been used in field studies, but problems arise there due to its susceptibility to external influences such as wind. Experiments on five resting subjects in an environmental chamber showed that 1) compared to a warm environment (35 degrees C), a cool one (22 degrees C) produced significant lowering of both Tac and rectal temperature (Tre), 2) the cool condition increased the difference between Tre and Tac, and 3) head treatment (helmet wear, wind) significantly affected Tac. In a second series of experiments, six subjects exposed to the same conditions performed mild exercise to abolish the progressive decline in Tre seen at 22 degrees C. Results showed that Tac still reflected external temperature and continued to show the influence of head treatment.
Tac has only limited usefulness in aircrew studies or other field work unless subjects can wear a protective helmet throughout the period of data collection.
在某些实验室条件下，耳道温度（Tac）是人体体温的一个有用指标。Tac也已用于实地研究，但由于其易受诸如风等外部影响，在实地研究中会出现问题。在环境舱中对五名休息的受试者进行的实验表明：1）与温暖环境（35摄氏度）相比，凉爽环境（22摄氏度）会使Tac和直肠温度（Tre）均显著降低；2）凉爽条件会增加Tre与Tac之间的差值；3）头部处理（戴头盔、吹风）对Tac有显著影响。在第二系列实验中，六名暴露于相同条件下的受试者进行轻度运动以消除在22摄氏度时观察到的Tre的逐渐下降。结果表明，Tac仍能反映外部温度，并继续显示出头部处理的影响。
除非受试者在整个数据收集期间都能佩戴防护头盔，否则Tac在空勤人员研究或其他实地工作中的用途有限。
